1. EureekaEureeka

2. What is the normal oxidation number of an uncombined Group 1 metal?

3. 0

4. In redox reactions what is conserved? Mass Charge Mass and charge Neither mass or charge

5. Mass and charge

6. During an oxidation what sub-atomic particle is lost?

7. electrons

8. What happens to the protons in the elements in a redox reaction?

9. nothing

10. What are possible oxidation states for H in a redox reaction?

11. +1 0

12. What is the oxidation number of carbon in NaHCO 3 ?

13. +4

14. Chlorine has an oxidation state of +3 in which compound? HClO HClO 2 HClO 3 HClO 4 HClO 2

15. What are the two oxidation states of N in: NH 4 NO 3 -3 +5

16. Which equation is a redox reaction? NaCl + AgNO 3  AgCl + NaNO 3 HCl + NaOH  H 2 O + KCl 2KClO 3  2KCl + 3O 2 H 2 CO 3  H 2 O + CO 2 

17. In the reaction Cl 2 + H 2 O  HClO + HCl Is the hydrogen reduced/oxidized/both /neither? __________

18. Draw a half reaction where Sn 0 undergoes oxidation Sn 0  Sn +2 + 2e -

19. Write the half reactions for the following reaction? Mg + Cl 2  MgCl 2

20. Which is more likely to be oxidized Copper or Zinc? Higher on J will be oxidized

21. If you put silver in copper nitrate what will happen? NOTHING

22. If you put copper in silver nitrate, what will happen? A REDOX RXN

23. Given the reaction: 2Al (s) + 6H +  2Al +3 + 3H 2 What is the total number of moles of electrons gained by H + when 2 moles of Al (s) is completely reacted?

24. 6

25. Mg + CuSO 4  MgSO 4 + Cu Which species acts as the oxidizing agent? Cu +2

26. The following example comes from: http://www.chem.iastate.edu/ group/Greenbowe/group/Greenbowe/sections/ projectfolder/flashfiles/redox/ home.html

34. In an electrochemical cell what occurs and the anode? What occurs at the cathode and what charge is given to it?

35. Refer to picture A -Is this electrolysis or an electrochemical cell? -What is the saying that helps you remember which is positive/negative in electrolytic cells -Which way do the positive ions migrate when the switch is closed?

36. A student wishes to set up an electrochemical cell. What other equipment will she need? Two beakers Wire Solid Zinc 0.1 M Zn(NO 3 ) 2 A voltmeter Pb metal 0.1 M Pb(NO 3 ) 2

37. Refer to picture B Write the half reaction that represents the oxidation that is taking place in the electrochemical cell Write the half-reaction that occurs at the cathode Write the balanced, net redox reaction that is taking place Draw an arrow showing the direction of the flow of electrons What is the purpose of the salt bridge.

38. Still referring to picture B At which electrode would you place something you wanted coated with a metal?